About Us

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Ad choices

Quantcast is a participant in both the Digital Advertising Alliance (DAA) and the European Interactive Digital Advertising Alliance (EDAA) and is committed to ensuring the data we analyze is fairly collected and used. We understand people are concerned about privacy, and we believe unwaveringly that consumers are entitled to both notice and choice across all interactive media platforms. Only through transparency can we all make informed choices.

Our Top Tenets

We believe in notice and choice.

We believe all consumers should be equipped with the information necessary to make choices.

We do not need to know, or want to know, consumers’ identities. Our business is specifically designed to never need to know who you are, and our Terms of Service explicitly forbid any partner to send us directly identifying information (sometimes called personally identifiable information or PII).

What exactly is PII?

Why is it good to participate, and allow online advertising?

Internet advertising allows content providers of all sizes and means to give you entertainment, information and more, without having to charge you for it. Instead of making you pay for their content, they make a living by selling ad space on their sites. Then they make you smile, laugh, cry or feel inspired, or any of the other experiences you enjoy when you receive their content, for free.

Observing and comparing browsing patterns allows us to help those content providers serve you ads that are pertinent to your life. If you’re a 25 year-old male, do you really want to see ads for Oil of Olay? Ok, maybe you’re the exception. In any case, this is among the reasons measurement is good for the Internet, and good for you.

That said, maybe you don’t like advertising and tracking more than you like free content, or care to support the people and entities who make it. Or, maybe you would prefer to see the same ads as everyone else, like when you watch TV.

Both are perfectly valid positions. In that case, here is some essential information you should have:

If you choose to opt out, what exactly are you opting out of?

By clicking on the opt out icon above, you are choosing not to receive Quantcast enabled interest-based content and advertisements in the browser you opt out from. You are also choosing not to have Quantcast measure your pattern of website browsing or other online media consumption from that browser.

When you opt out, Quantcast deletes our existing cookie identifier associated with your browser, ceases collection of personal information from that browser for advertising or measurement purposes, and ceases using any previously-collected data for targeting ads to you. We set an opt out cookie in your browser so that we can remember that you opted out. If you visit a Quantified site after an opt-out cookie has been set, we would see that a page view occurred and that the browser in question has opted out, and we would not log any personal information from the browser.

Opting out doesn’t mean you won’t be receiving interest-based content and advertisements from other (non-Quantcast) technology solutions or companies. We can only control the ads we serve.

Furthermore, be aware that even if you opt out of Quantcast enabled advertisements, you may find you still receive an ad from us. That’s because sometimes you will just happen to be browsing at a time and place where we serve an ad. That ad isn’t targeted to you, you just happen to be there. Also, it can take a day or more for all opt-outs to filter through our system.

Finally, please be aware that your opt out will not affect your Quantcast Choice cookie, which is used to preserve your privacy and choices for Quantcast and our customers. You can revisit your consent choices at any time by visiting the website where you made those choices. To revisit the consent choices that you made on Quantcast.com please visit the “Change Consent” link in the footer of this webpage (below).

How do I do it?

Just click on the opt out icon above.

How do I opt out for apps?

If you would like to opt out of Quantcast’s collection and use of mobile app data, you may do so through the device-level advertising preference setting available in the settings menus of your iOS and/or Android devices.

What about the cookie thing?

Quantcast’s opt-out tool is cookie based, so for it to work for you, your browser must allow third party cookies. We will set an opt out cookie to remember that your browser has opted out. If you change devices, browsers or delete this cookie, we will no longer know you have opted out, so you will need to opt-out again.

What does the Opt Out do if I consented to allow Quantcast to set cookies on my device?

We will always give your opt out top priority. So if we see that you previously gave consent to Quantcast to set cookies and/or use your data, and that you subsequently opted out via this opt out tool or the NAI, DAA, or EDAA industry opt out tools, we will honor your opt out as described above.